MediaRecorder should NOT receive decoded buffer and re-encode it

[whatisor]

aiortc/src/aiortc/contrib/media.py

Line 454 in cdba00d

context.task = asyncio.ensure_future(self.__run_track(track, context))

aiortc/src/aiortc/contrib/media.py

Line 487 in cdba00d

for packet in context.stream.encode(frame):

Current flow: aiortc -> recv -> decode -> encode -> write to file.
Better flow: aiortc -> recv -> write to file.